atmel sam l21 - · pdf fileoverview of sam l21 power domains . 4 © 2015 atmel corporation...

© 2015 Atmel Corporation 1

Atmel SAM L21

picoPower

Cortex-M0+

Microcontrollers

2 © 2015 Atmel Corporation

• New Ultra Low Power Cortex-M0+ Based microcontroller family

• Targeted for Battery powered applications

• Industries first Ultra Low Power Large Flash and SRAM Cortex-M0+

• Designed with emphasis on

• Low active mode power consumption

• Smart Low power peripherals

• Industry leading RAM retention numbers

• Leveraging two decades of Atmel Ultra Low power ARM, AVR and AVR32 know how

• Easy migration from existing SAM D families

• Code compatible to existing families with ASF

SAM L21


• Regulators & oscillators

• Multiple power sources and clocking options

• Flexible sleep modes

• Scale performance & power consumption

• Event System and Sleepwalking

• Multiple Domains

• Power & clock gating

• picoPower peripherals

• SERCOM, PTC & TC

• Low power analog

• Ultra Low power Process

The worlds lowest power Cortex-M0+ Micro Design methodology for picoPower devices

Overview of SAM L21 Power Domains


• SAM D21 active mode running coremark 103uA/MHz

• SAM L21 35uA/MHz

• Most competitors are in the 120-160 uA/MHz range for their comparable devices

• SAM D21 sleep mode with RAM retention and RTC: 3.8uA

• SAM L21 0.9uA

• No other vendors offer large SRAM low leakage CM0+

SAM L21 compared to SAM D21


• From 350 Ksps (D20/21) to 1Msps / 10K min sps

• 3 new internal inputs

• OPAMP01

• OPAMP2

• Scaled VBAT

• No fixed gain stage

• OPAMP can be used for Gain

• Flexible Power / Throughput rate management

• Input scan is changed to Sequencing

• More flexible than input scan

• Inputs do not need to be in a continuous sequence (input 3,4,5,6...)

• It is possible to select specific inputs to scan from lowest to highest (inputs 3,5,6 14...)

Updated Peripherals

ADC

ADC

ADC0

ADCn

...

Int. Sig

ADC0

ADCn

Int. Sig

...

INPUTCTRL

REFCTRL

INT1V

INTVCC

AREFB

CFGA

RESULT

OFFSETCORR

GAINCORRSWTRIG

EVCTRL

AVGCTRL

WINCTRL

SAMPCTRL WINUT

Post

Processing

PRESCALER

CTRLA

WINLT

AREFA


• 1Msps (350Ksps in D20/21)

• 12-bit DAC (10 in D20/21)

• 4-bit Dithering mode to reduce quantization error / extend resolution

• Can max be performed at 1Msps/16 (62500 sps)

• Will have to use one event channel and one TC in order to work

• If you are converting a 44Ksps 16-bit signal this can give you a 16-bit conversion over the standard 12-bits

• 2 DACs or single DAC in differential mode

• DMA support (dedicated trigger line)

Updated Peripherals

DAC


• Support for write while read (WWR)

• Less overhead for emulated EEPROM

• Makes FW upgrades easier

Updated Peripherals

NVM


• The touch performance of the SAM L21 PTC is identical to that of the SAM D series, but

• A touch accelerator was added to reduce CPU load and reduce overall power consumption

• Overall power consumption of the module was reduced

• The PTC is located in the low power domain and can remain powered while the rest of the system is sleeping

Wake up from touch on less than 2uA!

Updated Peripherals

Peripheral Touch Controller (PTC)


• Sleep mode

• The USB module can put the microcontroller in any sleep mode when the USB bus is idle and a suspend condition is given.

• Upon bus resume the USB module can wake the microcontroller from any sleep mode

Updated Peripherals

Full Speed USB host and Device


• Glue logic for general purpose PCB design

• Up to four programmable three input Look Up Table units (LUT)

• Combinatorial Logic Functions

• AND, NAND, OR, NOR, XOR, XNOR, NOT

• Sequential Logic Functions

• Gated D Flip-Flop, JK Flip-Flop, gated D Latch, RS Latch

• Flexible LookUp Table Inputs Selection

• I/Os

• Events

• Internal Peripherals

• Subsequent LUT Output

• Output can be connected to IO pins or Event System

• Optional synchronizer, filter or edge detector available on each LUT output

New Peripherals

Configurable Custom Logic (CCL)


• Decrypt and Encrypt

• 128 bit block of input data

• 128/192/256 bit keys supported

• Encryption time of 57/67/77 cycles with 128-bit/192-bit/256-bit cryptographic key

• Automatic or manual start

• Automatic conversion starts when input register is filled with the correct amount of data

New Peripherals AES – Advanced Encryption Standard


• (TRNG) passes the American NIST Special Publication 800-22 and Diehard RandomTests Suites

• When enabled generates a new 32-bit random number every 84 CLK_TRNG_APB cycles.

• Optional Interrupt when a new random number is available

• Can be used to generate inputs for Authentication challenges

11/2/2015

New Peripherals TRNG – True Random Number Generator


• 3 Individually configurable low power OpAmps

• Can be interconnected

• Rail to Rail inputs

• No need for external components with internal feedback resistors

• Internal resistors are muxable to form different resistor-OpAmp circuits

• Inputs available

• GPIO pins

• DAC

• Ground

• Output available:

• On GPIO pins

• Can be used as Input for AC and ADC

• Low power configuration options

• Performance/latency vs power

• On demand start-up for ADC and AC operations

New Peripherals

Op-Amp


• UART with wake-up from standby sleep

• auto-baud detection up to 115.2kbps

• Functional in sleep mode

• Connected to DMA

• Message reception in standby

• Operational in standby sleep

• Limit DMA or CPU resources used = lower power

• Built in logic

• Built in buffer

• picoPower SEROM is Optimized for low power consumption not high performance

New low power features

picoPower SerCom


• BOD33 or Automatic Power Switch can switch the backup domain to VBAT pin automatically

• Retains battery backup registers and RTC

• Backup domain can be forced to run from VBAT pin


Battery backup mode


• BACKUP Mode

• Most of logic and analog cells are powered off. The backup domain is kept powered (RTC, BOD, WDT, 32kHz clock sources and wake-up from external pins).

• OFF

• Core and backup domains are powered off.

• Cannot be entered if WDT is running

• Reset pin only source of wakeup

• Regulators

• On the Fly selection of LDO and Buck regulator


Sleep modes BACKUP and OFF


SAM L21 Tools


• Xplained Pro with power measurements

• Full support in Atmel Studio and ASF

• Appnotes

• Example code and projects

• QTouch support for

• Buttons

• Slider

• Wheels

• Surface

Tools for SAM L21


• Power consumption measurement and visualization

• Support power profiling on SAML21 using SAML21-XPRO board.

• Demonstrate low power modes of SAML21

• Program Counter values included to track power consumers in your application

SAM L21 tools

Added features in Atmel Tools for picoPower Atmel|SMART


Flash / SRAM / LP SRAM Sub-Series

256KB / 32KB / 8KB

128KB / 16KB / 8KB

64KB / 8KB / 4KB

32KB / 4KB / 2KB

Package 32-pin QFN and TQFP 48-pin QFN and TQFP 64-pin QFN and TQFP

Introduction

SAM L21 Series

SAM L21G 3x 16b T/C 6x SERCOM 14-ch ADC 2-ch DAC

2x An.comp

Main Features and Functions in all devices: ARM Cortex M0+ CPU at 48 MHz, 1.62-3.6V operation, -40°C – 85°C temp grade

Ultra low power analog: 12-bit 1 Msps ADC, 12-bit DAC, 2 analog comparators, 3x op-amp Peripheral Touch Controller, 32-bit RTC with calendar mode, AES, TRNG

12-ch Event system, and 16-ch DMA controller with next generation SleepWalking USB host/device, SERCOM supports USART, UART with autobaud,

SPI, I2C up to 3.4MHz, PM/SMBus, IrDA 3 Timer/Counters for Control applications, Ultra low power SERCOM and Timer/Counter

SAM L21J 5x 16b T/C 6x SERCOM 20-ch ADC 2-ch DAC

2x An.comp

SAM L21E 3x 16b T/C 4x SERCOM 10-ch ADC 2-ch DAC

2x An.comp

23

Atmel® | SMART SAM L22 Ultra-low power segment LCD Controller


• Atmel | SMART ARM® based Cortex-M0+ Controller, 32MHz

• supported by Atmel Studio® , ASF® , Atmel Xplained Pro boards and other 3rd party compilers/IDE/SW/Tools inlcuding IAR® and Keil®

• Targeted for segment LCD and/or Battery powered applications

• Industries first Ultra Low Power Large Flash and SRAM Cortex-M0+ segment LCD Controller

• Pin and Code compatible with all SAMRT ARM Cortex-M0+ Controller (except for SLCD pins)

SAM L22 - Introduction

Advantages and Features System and Core


• Active mode: <50µA/MHz

• Standby with RTC and LCD = 3uA

• Inclusive logic and SRAM retention and LCD

• <3.4 µs wake-up time

• Standby with RTC: <1.5uA

• Inclusive logic and SRAM retention

• <3.4 µs wake-up time

• Backup with RTC: <600nA

• No SRAM retention

• 4x32-bit backup registers

• <95 µs wake-up time

SAM L22 - Low Power consumption

Ultra Low Power Atmel | SMART microcontroller


SAM L22 - Segment LCD Controller

Advantages and Features

• Up to 8 common terminals

• up to 40 (44) segment terminals

• Bias: static, 1/2, 1/3, 1/4

• Duty: static, 1/1, 1/2, 1/3, 1/4, 1/6, 1/8

• Flexilibity for different segment LCDs

• All SLCD Pins can also be used as GPIOs

• On the 100Pin device, 8 SLCD Pins are only GPI

• Of 52 SLCD I/O lines the user can select up to 48 SLCD Pins

• 100Pin: 8 com max 320 (8x40), 4 com max 176 (4x44) segments




• Shadow display memory for full freedom in segment update

• Software contrast adjustment control

• Lower the power consumption trough

• DMA

• Sleepwalking

• Interrupt request and event output for display update

• Switch from regular to low power waveform

• Blinking

• Automated Character Mapping (ACM)

• Automated Bit Mapping (ABM)

• Lower BOM

• On-chip LCD power supply

• need only one external capacitor (typ 1uF)


Additional Features


SAM L22 - Segment LCD Controler

Advantages and Features

• Automated Character Mapping (ACM) uses DMA

• Automated Bit Mapping (ABM) uses DMA

• Blinking

ACM & ABM ACM & ABM & Blink


• 2 options for blinking

• Blink all segments

• Blink selected segments

• Up to 16 segments (connected to SEG0, SEG1 and COM0 to COM7)

• Available in Sleep and Active mode

• Selectable blink frequency

• Reduce interrupt frequency

• Reduce power consumption


Segment Blinking


Flash / SRAM Sub-Series

256KB / 32KB

128KB / 16KB

64KB / 8KB

LCD controller 0 –120 segments 0 – 184 segments 0 – 320 segments

SERCOM 3xSERCOM 4xSERCOM 6xSERCOM

ADC 8ch-ADC 10ch-ADC 20ch-ADC

PTC Pins Mutual X x Y /

Self-Cap Y 10x11 / 13 13x14 / 19 16x16 / 24

GPIOs Up to 36 GPIOs Up to 50 GPIOs Up to 82 GPIOs

Package 48-pin TQFP and QFN 64-pin TQFP and QFN 100-pin TQFP and VFBGA

SAM L22 - Series Differences Overview

Atmel | SMART Ultra Low Power segment LCD Controller series

SAML22G18

SAML22G17

SAML22G16

SAML22N18

SAML22N17

SAML22N16

SAML22J18

SAML22J17

SAML22J16

Development


SAM L22 Tools


• Display extension with SLCD1-XPRO

• Full support in Atmel Studio and ASF

• Appnotes

• Example code and projects

• QTouch support for

• Buttons

• Slider

• Wheels

• Surface

Tools for SAM L22

ATSAML22-XPRO w/ SLCD1-XPRO


Demonstration : Data Visualizer

© 2015 Atmel Corporation.

Atmel® , Atmel logo and combinations thereof, Enabling Unlimited Possibilities® , and others are registered trademarks or trademarks of Atmel Corporation or its subsidiaries. ARM® , ARM Connected® logo and others are the registered trademarks or trademarks of ARM Ltd. Other terms and product names may be the trademarks of others.

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atmel sam l21 - · pdf fileoverview of sam l21 power domains . 4 © 2015 atmel corporation...

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